After my struggles with CCC-installed Sonar 64, I found an error in the registry: The value for "VSTScanPath" in "HKEY_CURRENT_USER\Software\Cakewalk Music Software\SONAR\Cakewalk VST X64" pointed to the 32-bit version of VstScan.exe in Program Files (86). I changed the value to the 64-bit path and rescanned. Then Sonar found the correct 64-bit versions of the previously unloadable modules. And all the prochannel modules (icons) could be found for insert, and old (made in 32-bit) projects would load OK in 64-bit Sonar.